Characteristics of Bacterial Cells
The tissue type composed of a layer, or layers, of closely packed cells that cover organ surfaces, line structures, and form glands is
epithelial
The tissue type that covers and protects surfaces, both inside and outside the body is called
epithelium
The tissue layers that gives rise to all the body's mature tissues are called the
Germ layer
Choose the embryonic germ layers.
Mesoderm Ectoderm Endoderm
Stratified epithelium
More than one layer of cells with only the deepest layer contacting the basement membrane
True or false: Pseudostratified epithelial tissue consists of many cell layers, therefore it is considered a stratified epithelium.
Pseudostratified epithelium consists of tall columnar cells and shorter basal cells. All cells resting on the basement membrane creating a false appearance of stratification. This is simple epithelium (one layer). Notice that all of the cells contact the basement membrane and extend to the free surface. T
What are the functions of epithelial tissue?
Secretion of substances Act as a barrier
What are the two criteria used to classify the different types of epithelial tissue?
Shape of epithelial cells Number of cell layers
Pseudostratified epithelium
Single layer of cells; all cells attach to basement membrane but not all cells reach the free surface.
Simple epithelium
Single layer; cells extend from basement membrane to free surface.
What type of tissue covers body surfaces and lines body cavities?
Epithelial
What class of tissue is capable of secretion and absorption of substances?
Epithelial tissue
An epithelium consisting of a single layer of cells in which all cells rest directly on the basement membrane is ______.
simple
The epithelium consisting of one layer of cells in which all cells rest directly on the basement membrane, but appear to be arranged in layers, is
simple or pseudostratified
An aggregation of cells and extracellular materials which performs a discrete function is known as a(n) ______.
tissue
Collections of specialized cells and extra-cellular substances around them are known as a(n)
tissue